const unsigned long *bvector_bits (bvector_t);
size_t bvector_maxsize (bvector_t);
-struct svector;
typedef struct svector *svector_t;
svector_t svector_create (size_t);
char **svector_strs (svector_t);
size_t svector_size (svector_t);
-struct ivector;
typedef struct ivector *ivector_t;
ivector_t ivector_create (size_t);